I am no aalima but I do try to be modest and mind my business about religious matters, perform my fardhs and all that, but yeah I do have to catch up on a lot of things Islamically. Milly, I usually don't argue with such people (as much as I sometimes would like to) because I'm afraid of saying something that is incorrect.
Walking off in a strop whist flicking ones hair is not arguing, it means you've won!